FAQ
HA: Send block report from datanode to both active and standby namenodes
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Key: HDFS-1971
URL: https://issues.apache.org/jira/browse/HDFS-1971
Project: Hadoop HDFS
Issue Type: Sub-task
Components: data-node, name-node
Reporter: Suresh Srinivas
Assignee: Sanjay Radia


To enable hot standby namenode, the standby node must have current information for - namenode state (image + edits) and block location information. This jira addresses keeping the block location information current in the standby node. To do this, the proposed solution is to send block reports from the datanodes to both the active and the standby namenode.


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  • Suresh Srinivas (Resolved) (JIRA) at Dec 1, 2011 at 1:12 am
    [ https://issues.apache.org/jira/browse/HDFS-1971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

    Suresh Srinivas resolved HDFS-1971.
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    Resolution: Fixed
    Hadoop Flags: Reviewed

    I committed the patch.
    HA: Send block report from datanode to both active and standby namenodes
    ------------------------------------------------------------------------

    Key: HDFS-1971
    URL: https://issues.apache.org/jira/browse/HDFS-1971
    Project: Hadoop HDFS
    Issue Type: Sub-task
    Components: data-node, name-node
    Affects Versions: HA branch (HDFS-1623)
    Reporter: Suresh Srinivas
    Assignee: Sanjay Radia
    Fix For: HA branch (HDFS-1623)

    Attachments: DualBlockReports.pdf, daulBr1.patch, dualBr2.patch, dualBr3.patch, dualBr6.patch, dualbr4.txt, dualbr5.txt


    To enable hot standby namenode, the standby node must have current information for - namenode state (image + edits) and block location information. This jira addresses keeping the block location information current in the standby node. To do this, the proposed solution is to send block reports from the datanodes to both the active and the standby namenode.
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